Improvement in tubexcutters



j. W. .HEPSUW Mba-Gutters.

`Patented Dec-31, 1872.

IMPROVEMENT IN TUBECUTTERS.

Speciiication forming part of Letters Patent No. 134,47*?, dated December 3l, 1872;

To all whom it may concern:

Beit known that I, JOHN V. JErsoN, of Brooklyn, in the county of Kings and State of New York, have invent-ed a new and useful Improvement in Tube-Outteraof which the following is a full, clear, and exact description, reference being had to the accompanying drawing forming part of this specification, and in which` Figures 1 and 2 representlongitudinal views, from the side and front, of a tube or pipe cutter constructed in accordance withn my improvement; and Fig. 3, a longitudinal sectional view, as seen from the side of the cutter.

Similar letters of reference indicate corre spending parts.

A main object of my invention is to produce a pipe-cutter that shall be better adapted to dii'erent kinds or sizes of work than those heretofore in use without adding to its bulk or weight. It also avoids the objection, which is incidental to other cutters, ot' cutting a spiral upon the pipe instead of dividing or cutting it oft' square. To these ends the cuttingtool is made independently adjustable to its work through a cutter-head arranged to slide within a frame of peculiar construction, and the Whole implement or cutter made to take its bearing upon the pipe as a center, about which it revolves, entirely distinctfrom the cutting-tool as a bearin g-surface or clip. Also, the invention includes a certain construction of cutting-tool and fit of the tool-holder, which facilitates the cutting-tool being sharpened or renewed 5 and, by said tool having a pointed or clean cut, no burr is left on the outside nor stricture on the inside of the pipe at its cut, as is invariably the case in those cutters which employ knives or wheels that press apart the fibers of the pipes.

Referring to the accompanying drawing, A represents the'frame of the cutter. This frame is of elongated form, being composed, in part, of a slotted back, a, which serves to support and guide the sliding cutter-head B, and, in part, of ends b and c. The sliding cutter-head or block B isreduced to form a bearin g surface or shoulder against the inner face of the back a, and is secured in its sliding connection with said back by a cross-pin, d, and setscrew e, which admit of its speedy removal, when desirable, for extraction of the cutter or otherwise. The advance surface of the cut ter-head is provided with bearing rollers or projections f, andthe outer end c of the frame with corresponding bearing projections or rollers g, to receive the pipe in between them, and which form surfaces for the Whole cutteiJs rotation around the pipe as a center.

The cutter-head B is setup to its clip of the pipe by an adjusting screw, C, working through the inner end b of the frame, and bearing in a loose or free manner against the rear of the cutter-head. The cutting-tool D is of a lieveling and pointed nose-edge shape at its cutting extremity, and of a generally-flat solid construction, the same being arranged to Iit alongitudinal groove made in a circular bolster, E, which is :fitted to freely slide through the cutter-head, and which, together with the cutting -tool, is prevented frpm turning by causing a projecting edge of the cutting-tool to play through a slot or groove in the cutterhead. Said cutting-tool D is held inthe slot of the bolster E by a screw, h, which facilitates its adjustment or removal. Itis fed up to its cut, as required, after the whole implement has been adjusted to its clip of the pipe, as hereinbefore described, by turning the lever or handle F of the implement, said lever having a screw-thread on it, which works through a female thread in the end b of the frame, and having a loose or free bearing on the back of the bolster E.

A pipe cutter constructed as described, while free from objectionable bulk or weight, provides within its frame for a large range in the sizes of pipe it is capable of Operating on 5 is prevented from cutting spirally by its clip (independently of the cuttingtool) ot' the pipe as a center about which it revolves; the tool cuts clean and square, without leaving burr or stricture on the pipe 5 and every facility is afforded for sharpening or renewal of the cuttin g-tool and adjustment or replacement of the various parts ot' the implement.

What is here claimed, and desired to be seA cured by Letters Patent, is-

'lhe combination ofthe bolster E with the cutting-tool D, constructed and arranged in relation with the cutter-head B, as specified.

' JOHN V. J EPSON.

Witnesses:

HENRY T. BROWN, FRED. Harinas. 

